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递等式计算.20×45-855÷5(55+250)÷(30-25)(125+13×24)×534×15-350÷7.

题目详情
递等式计算.
20×45-855÷5                
(55+250)÷(30-25)
(125+13×24)×5             
34×15-350÷7.
递等式计算.
20×45-855÷5                
(55+250)÷(30-25)
(125+13×24)×5             
34×15-350÷7.




▼优质解答
答案和解析
(1)20×45-855÷5
=900-171
=729;

(2)(55+250)÷(30-25)
=305÷5
=61;

(3)(125+13×24)×5
=(125+312)×5
=437×5
=2185;

(4)34×15-350÷7
=510-50
=460.